Incomplete fusion reactions

A review of incomplete fusion reactions is given. The localization of the entrance chanel angular momentum window is discussed for incident energies lower than 10 MeV per nucleon and is found to depend on the target deformation. With deformed target “peripheral” collisions are observed with ? values in the vicinity of ?_cr for complete fusion, while for spherical targets, the ? window is centered around values lower than 0.5 ?_cr. These properties are discussed on the grounds of available theoretical models. All other properties of the reactions such as cross sections, angular distributions, shape of the energy spectra of light ejectiles are discussed to bring additional informations about the reaction mechanism.